Tetrahydrofuran → 6-fluoro-1H-indole-5-carboxylic acid

Participants

Reaction Steps

6-Fluoro-1-(triisopropylsilyl)-1H-indole-5-carboxylic acid (4.36 g, 13.00 mmol) was treated with THF (30 mL) and tetra-n-butylammonium fluoride (1.0 M in THF, 13.0 mL, 13.00 mmol) and stirred at RT for 15 min. The reaction mixture was diluted with Et2O (30 mL) resulting in a suspension which was collected by filtration affording 6-fluoro-1H-indole-5-carboxylic acid (2.41 g) as a white crystalline solid. MS (ESI, pos. ion) m/z: 180.1 (M+H)+. The crude material was used in the subsequent reaction without further purification.

Provenance & Evidence